Mine wont do high overclock speeds, but they will do 1T at any stable speed, & tighter timings at my chosen speed of 229MHz. What voltage are you using? They dont like much these HZs. I started off on Auto (2.75v) but got better stability on 2.6v. Here's all the timings I have set if its any help:
CPU Frequency = 280
CPU Multiplier = 9
DRAM Divider = 166 (5:6)
DRAM Frequency = 229
CPU voltage = 1.55v
DRAM voltage = 2.6v
Chipset voltage = 1.5v
Command Per Clock (CPC) = 1T
CAS Latency Control (Tcl) = 3
RAS# to CAS# delay (Trcd) = 3T
Min RAS# active time (Tras) = 6T
Row precharge time (Trp) = 3T
Row Cycle time (Trc) = 7T
Row refresh cyc time (Trfc) = 13T
Row to Row delay (Trrd) = 2T
Write recovery time (Twr) = 2T
Write to Read delay (Twtr) = 1T
Read to Write delay (Trwt) = 3T
Refresh Period (Tref) = 7.8µs
R/W Queue Bypass = 16
Bypass Max = 7
32 Byte Granularity = Disable
DQS Skew Control = Disable
DQS Skew Value = 0
Read Preamble Time = 5.0ns
IdleCycle Limit = 16T
Max Async Latency = 7.0ns
Dynamic Counter = Enable
Im using two one gig sticks bought from newegg just two weeks ago, ram does close to 300 but wont do 1t at any speed, so i sent it back, all the reviews, including on the gskill web site listed it as running 1t command rate. I used all voltages up to 2.85 but no 1t.
I just got mine and threw them in. First I tried 3-4-4-8 at 1t, did not boot propery into windows lowered to 2t, booted fine. Then i changed to 3-5-5-10 and 1t and its working currently, obviously have many stress tests that need some running. And i'm going to try lowering voltage.
Having some pretty bad luck with mine as well. Keep getting restarts and crashes at 1t. and this is only at 240mhz. I really need a new mobo, this a8r-mvp is just not playing nice with any ram.
Originally posted by: Elfear
Mine will do 275MHz with a 1T command rate. Sounds like your board might not like the sticks or you need to mess with the settings some more.
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